I followed the steps to revert back to eu4 1.28.3, then put a backup copy of the mod I had been playing under 1.28.3 into the mod folder and attempted to start; the game crashes at the "creating borders" screen. Nothing in the mod was changed from what was working fine in it before. I saw one person had recommended deleting the settings.txt file before reverting so that the game would recreate it; tried that get the same result. Is there anyway to do a clean install of the 1.28.3 version to eliminate any chance that there was some residual changes from 1.29?